Movement resistant retroreflective pavement marker

Details Movement resistant retroreflective pavement marker Movement resistant retroreflective pavement marker

1994-05-31

1996-05-07

Neuder, William P.

Road structure, process, or apparatus

Traffic director

Attenuated lane marker type

E01F 906

Patent

active

055139248

ABSTRACT:
A retroreflective pavement marker having shell-like hollow housing (with or without downwardly projecting ribs), downwardly projecting stud formed integrally as a unit with the housing, and thermoplastic retroreflectors having retroreflective elements visible through apertures in the housing. An epoxy based filler holds the reflector plate (or reflective plates) in place in the housing by solidly binding to the housing, stud and reflector plate (or reflective plates), adding impact resistance to the marker. The stud has outwardly extending vanes running along its longitudinal axis, creating an X-shaped cross-section. The vanes have outwardly facing flat surfaces and rounded surfaces therebetween. The marker is made by forming the housing (with or without ribs) and stud, placing the reflector plate (or reflective plates) in the housing, dispensing liquid fill material in the housing, and hardening the fill material.

REFERENCES:
patent: 1683121 (1928-09-01), Baldwin
patent: 1928447 (1933-09-01), Cornell, Jr.
patent: 4875798 (1989-10-01), May
patent: 5226745 (1993-07-01), Gartlacher
patent: 5354143 (1994-10-01), Lindner

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